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tknguyenst123
2 năm trước
1 : Một dung dịch nước vôi trong có PH=12 nồng độ của Ca(OH)2 là 2: tinh PH của dung dịch HNO3 0.63% biết rằng khối lượng riêng của dung dịch này là D=1g/ml
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